/*
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 */
package com.zavakid.scala.exercise.chapter5

/**
 * @author zavakid 2013-6-8 下午5:00:18
 * @since 1.0
 */
class Counter {
  private var privateValue: Int = 0 // You must initialize the field
  def increment() { if (privateValue == Int.MaxValue) privateValue = 0 else privateValue += 1 } // Methods are public by default
  def current() = privateValue

  // 必须成对出现
  def value = privateValue
  def value_=(v: Int) {
    if (v > 0) privateValue = v
  }
}